X-ray grazing incidence technique-corrections in residual stress measurement-a review

作者：Wronski S^*; Wierzbanowski K; Baczmanski A; Lodini A; Braham Ch; Seiler W

来源：Powder Diffraction, 2009, 24(2): S11-S15.

DOI：10.1154/1.3139054

• diffraction
• grazing incidence
• residual stresses
• X-ray refraction

Using X-ray grazing incidence diffraction (GID) it is possible to perform a nondestructive analysis of the heterogeneous stress field for different volumes below the surface of the sample. The stress can be measured at very small depths, of the order of a few mu m. The penetration depth of radiation is almost constant in a wide 2 theta range for a given incidence angle alpha. It can be easily changed by all appropriate selection of alpha angle (or also by using a different type of radiation). There are, however, some factors which have to be corrected in this technique. The most important is the refraction of X-ray wave: it changes the wavelength and direction of the beam. Both effects modify a pick position. A corresponding correction was calculated and tested on ferrite powder and on 316L austenite stainless steel sample.

• 出版日期2009-6